Remove tvOS close button from MPV debug stats overlay

Menu remote already dismisses the overlay via TVPlayerView's exit
command handler, so the in-overlay close button is redundant.

Yattee/Views/Player/tvOS/TVPlayerView.swift

@@ -286,8 +286,7 @@ struct TVPlayerView: View {
                 MPVDebugOverlay(
                     stats: debugStats,
                     isVisible: $isDebugOverlayVisible,
-                    isLandscape: true,
-                    onClose: { hideDebugOverlay() }
+                    isLandscape: true
                 )
                 .transition(.opacity.combined(with: .scale(scale: 0.95)))
             }